start

[Transaction(TransactionMode.Manual)]

[Regeneration(RegenerationOption.Manual)]

public class cmd : IExternalCommand

{

    public Result Execute(ExternalCommandData cmdData, ref string msg, ElementSet elements)

    {

        UIDocument uiDoc = cmdData.Application.ActiveUIDocument;

        Document doc = uiDoc.Document;

        Selection sel = uiDoc.Selection;

        Transaction ts = new Transaction(doc, "http://revit.5d6d.com");

        try

        {

            ts.Start();

            //找到类型的方法，这里找到文字注释类型

            Categories cates = doc.Settings.Categories;

            Category cate = cates.get_Item(BuiltInCategory.OST_TextNotes);

            //设置类型可见性

            doc.ActiveView.setVisibility(cate, false);

            ts.Commit();

        }

        catch (Exception ex)

        {

            //WinFormTools.MsgBox(ex.ToString());

        }

        return Result.Succeeded;

    }

}

url:http://greatverve.cnblogs.com/p/category-setVisibility.html